The Galaxy S7 and the Galaxy S7 edge units launched in the US are powered by the Snapdragon 820 processor. However, if you want to try out the Exynos variant of the Galaxy S7 edge in the US, you can purchase one on eBay for $699.99.
The unlocked international variant of the Galaxy S7 edge (SM-G935F) with an Exynos 8890 chipset (and ARM Mali-T880MP12) is available for purchase in the US through eBay. It's available in black, gold, and silver. The smartphone will be compatible with most LTE bands in the country, but it won't support CDMA networks.
Seller 232tech is shipping the device in the US without any additional charge, but the device lacks official US warranty. So, beware if you don't want to end up with a high-end smartphone without official warranty.